Super Low Gearing

Includes the following changes:

Phinney Ridge Sport:
SLX mountain bike rear derailleur (instead of 105)

Phinney Ridge Pro:
Deore XT mountain bike rear derailleur (instead of Ultegra)

Both Models:
Wolf Tooth adapter for mountain derailleur to 105/Ultegra shifters

Sunrace 11-40 cassette (instead of 11-32)